Collier County · Naples / Marco Island · Gulf Coast
Marco Island Beach Water Quality
Water quality is GOOD — Safe for swimming
The most recent test at Marco Island Beach showed enterococcus bacteria levels of 16 CFU/100mL, which is well within the safe range (35.4 or below CFU/100mL). Conditions are considered safe for swimming and water activities.
Historical Risk Rating
Marco Island Beach has an excellent track record. Only 8% of tests in the last 12 months returned poor results.
Water Quality History — Last 12 Months
Values in CFU/100mL. Green = Good (≤35.4), Yellow = Moderate (35.5–70.4), Red = Poor (≥70.5)
Swimming After Rain
Rainfall can wash bacteria, fertilizers, and other pollutants into the ocean through stormwater runoff. The Florida DOH recommends waiting at least 72 hours after heavy rain before swimming, especially near inlets, canals, and river mouths. If it has rained recently in the Collier County area, use extra caution.
About Marco Island Beach
The largest of Florida's Ten Thousand Islands, Marco Island offers crescent-shaped Tigertail Beach and the popular South Marco Beach.
Nearby Beaches
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Disclaimer: Water quality data is sourced from the Florida Department of Health Healthy Beaches Program. Conditions can change rapidly. This website provides informational estimates only — always check with Florida DOH for official, real-time beach conditions. Safe to Swim Florida is an independent project and is not affiliated with any government agency.